During the Battle For Detroit, there is a cutscene where Kara picks up a gun from the ground. As she holsters it, pay close attention to the movie theater marquee that is shown above her and to the right. The movies listed are Heavy Rain, To Infinite and Beyond, Nomad Soul, and Jungle 2. Aside from the last one, these are references to Heavy Rain, Beyond: Two Souls, and Omikron: The Nomad Soul, all of which are games made by Quantic Dream.